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15. A doctor claims that the proportion of Americans exercising the recommended minimum of 45 minutes per day is less than ten percent.  A sample of 550 Americans reveals that 52 of them exercise at least 45 minutes per day.  At the 10% significance level test the doctor’s claim.

claim: p < 0.10

Ho: μ ≥ 0.10        Ha: μ < 0.10

z = -0.43, Critical Value = -1.282,

The sample data does not support the claim ...